Date
Page
Prove that:-
COSA
1-sina
tros A = 2Seck
It sina
Nep
Answers
Answered by
1
Answer:
Date
Page
Prove that:-
COSA
1-sina
tros A = 2Seck
It sina
Nep
Answered by
1
Answer:
LHS : 1+sinAcosA+cosA1+sinA=(1+sinA)(cosA)cos2A+(1+sinA)2
=(1+sinA)(cosA)1+sin2A+cos2A+2sinA=(1+sinA)(cosA)2+2sinA
=(1+sinA)(cosA)2(1+sinA)=cosA2=2secA
=RHS.
Step-by-step explanation:
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